I ended up gong out to play real pinball after work last night so I didn't have much time to tweak, but I did raise the friction co-efficient on TL. That seemed to help the "weird" behavior that I was experiencing.
Now I'm thinking that I need to fiddle with the flipper strength a bit. I only have one TL that I can play as a comparison point, but I feel like the shot straight up the middle (disc war multiball?) is much easier on VP than it is IRL. On my cab I can shoot that thing all day and I get 2x to 3x the score I do on the actual machine.
One thing I did notice after fiddling with the friction co-efficient was that the ball bounces around on the outlane posts in a way similar to real Stern machines. That was pretty cool.